My son and his friend attended the Headfirst Honor Roll camp in 2002 and 2003 in Jupiter and it was fantastic. I can't say enough good about it. My son is currently a freshman at Stanford and his friend had a very successful freshman season at Williams. Both got quite a bit of recruiting interest as a direct result of the camp and both had several different options prior to their final choices. Brendan Sullivan runs a first class showcase and more than that, he is truly doing it because he loves kids and loves baseball. He has been written up in a NY Times magazine article and also in Stanford magazine recently for his success.
You can PM me if you have more questions. Son also attended, by the way, the PG Jupiter Wood Bat Championships and had a great experience there as well. A few others were less well-run and attended. One of the advantages of HeadFirst is that it is very small and there is hands-on instruction and lots of information about recruiting and colleges.
Do note, however, that the schools which attend are all very strong academically and the kids who attend should have good grades and pretty high SAT/ACT scores to be eligible for admission to those colleges.